What use is a floor runner if it doesn't stop mud and mess in their tracks? The raised grid design goes deeper than simple good looks — each nub effectively acts as a brush to slog dirt and grime off sloppy soles and trap it in the channels so it doesn't get carried through your home. Then, the "water dam" edge acts as a levee for all the water, slush, and snow that come with wet weather. This mat can hold up to a gallon of moisture at a time. It won't rot, fade, or fail. And grippers on the rubber backing make sure it stays squarely in place.